Physical activity facts, U.S. Centers for Disease Control and Prevention

Physical Activity Research Center, funded by Robert Wood Johnson Foundation

“Parks and Recreation Programs Help to Reduce Childhood Obesity,” research brief, University of California, Berkeley

“How Neighborhoods Can Reduce the Risk of Obesity,” research brief, RAND Corp.

“Parks and Health: Aligning Incentives to Create Innovations in Chronic Disease Prevention,” research brief, U.S. Centers for Disease Control and Prevention